Apparently the diamond synchrotron is bright.  How about 10 billion times brighter than the sun!  Here is a bit more on how this type of device works and what it is:

The entire world of synchrotron science depends on one physical phenomenon: When a moving electron changes direction, it emits energy. When the electron is moving fast enough, the emitted energy is at X-ray wavelength.

A synchrotron machine exists to accelerate electrons to extremely high energy and then make them change direction periodically. The resulting X-rays are emitted as dozens of thin beams, each directed toward a beamline next to the accelerator. The machine operates day and night, with periodic short and long shutdowns for maintenance.

Let’s watch the video on the diamond synchrotron on page 2

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